<?php  

/* 
@版本日期: 版本日期: 2012年1月18日 
@著作权所有: 1024 intelligence ( http://www.1024i.com ) 

获得使用本类库的许可, 您必须保留著作权声明信息. 
报告漏洞，意见或建议, 请联系 Lou Barnes(iua1024@gmail.com) 
*/  


class Image{  
    private $image = null;  
    private $type = null;  

    // 构造函数  
    public function __construct(){}  


    // 析构函数  
    public function __destruct()  
    {  
        if($this->image!==null) $this->image->destroy();   
    }  

    // 载入图像  
    public function open($path)  
    {  
        $this->image = new Imagick( $path );  
        if($this->image)  
        {  
            $this->type = strtolower($this->image->getImageFormat());  
        }  
        return $this->image;  
    }  


    public function crop($x=0, $y=0, $width=null, $height=null)  
    {  
        if($width==null) $width = $this->image->getImageWidth()-$x;  
        if($height==null) $height = $this->image->getImageHeight()-$y;  
        if($width<=0 || $height<=0) return;  

        if($this->type=='gif')  
        {  
            $image = $this->image;  
            $canvas = new Imagick();  

            $images = $image->coalesceImages();  
            foreach($images as $frame){  
                $img = new Imagick();  
                $img->readImageBlob($frame);  
                $img->cropImage($width, $height, $x, $y);  

                $canvas->addImage( $img );  
                $canvas->setImageDelay( $img->getImageDelay() );  
                $canvas->setImagePage($width, $height, 0, 0);  
            }  

            $image->destroy();  
            $this->image = $canvas;  
        }  
        else  
        {  
            $this->image->cropImage($width, $height, $x, $y);  
        }  
    }  

    /* 
    * 更改图像大小 
    $fit: 适应大小方式 
    'force': 把图片强制变形成 $width X $height 大小 
    'scale': 按比例在安全框 $width X $height 内缩放图片, 输出缩放后图像大小 不完全等于 $width X $height 
    'scale_fill': 按比例在安全框 $width X $height 内缩放图片，安全框内没有像素的地方填充色, 使用此参数时可设置背景填充色 $bg_color = array(255,255,255)(红,绿,蓝, 透明度) 透明度(0不透明-127完全透明)) 
    其它: 智能模能 缩放图像并载取图像的中间部分 $width X $height 像素大小 
    $fit = 'force','scale','scale_fill' 时： 输出完整图像 
    $fit = 图像方位值 时, 输出指定位置部分图像  
    字母与图像的对应关系如下: 

    north_west   north   north_east 

    west         center        east 

    south_west   south   south_east 

    */  
    public function resize_to($width = 100, $height = 100, $fit = 'center', $fill_color = array(255,255,255,0) )  
    {  

        switch($fit)  
        {  
            case 'force':  
                if($this->type=='gif')  
                {  
                    $image = $this->image;  
                    $canvas = new Imagick();  

                    $images = $image->coalesceImages();  
                    foreach($images as $frame){  
                        $img = new Imagick();  
                        $img->readImageBlob($frame);  
                        $img->thumbnailImage( $width, $height, false );  

                        $canvas->addImage( $img );  
                        $canvas->setImageDelay( $img->getImageDelay() );  
                    }  
                    $image->destroy();  
                    $this->image = $canvas;  
                }  
                else  
                {  
                    $this->image->thumbnailImage( $width, $height, false );  
                }  
                break;  
            case 'scale':  
                if($this->type=='gif')  
                {  
                    $image = $this->image;  
                    $images = $image->coalesceImages();  
                    $canvas = new Imagick();  
                    foreach($images as $frame){  
                        $img = new Imagick();  
                        $img->readImageBlob($frame);  
                        $img->thumbnailImage( $width, $height, true );  

                        $canvas->addImage( $img );  
                        $canvas->setImageDelay( $img->getImageDelay() );  
                    }  
                    $image->destroy();  
                    $this->image = $canvas;  
                }  
                else  
                {  
                    $this->image->thumbnailImage( $width, $height, true );  
                }  
                break;  
            case 'scale_fill':  
                $size = $this->image->getImagePage();   
                $src_width = $size['width'];  
                $src_height = $size['height'];  

                $x = 0;  
                $y = 0;  

                $dst_width = $width;  
                $dst_height = $height;  

                if($src_width*$height > $src_height*$width)  
                {  
                    $dst_height = intval($width*$src_height/$src_width);  
                    $y = intval( ($height-$dst_height)/2 );  
                }  
                else  
                {  
                    $dst_width = intval($height*$src_width/$src_height);  
                    $x = intval( ($width-$dst_width)/2 );  
                }  

                $image = $this->image;  
                $canvas = new Imagick();  

                $color = 'rgba('.$fill_color[0].','.$fill_color[1].','.$fill_color[2].','.$fill_color[3].')';  
                if($this->type=='gif')  
                {  
                    $images = $image->coalesceImages();  
                    foreach($images as $frame)  
                    {  
                        $frame->thumbnailImage( $width, $height, true );  

                        $draw = new ImagickDraw();  
                        $draw->composite($frame->getImageCompose(), $x, $y, $dst_width, $dst_height, $frame);  

                        $img = new Imagick();  
                        $img->newImage($width, $height, $color, 'gif');  
                        $img->drawImage($draw);  

                        $canvas->addImage( $img );  
                        $canvas->setImageDelay( $img->getImageDelay() );  
                        $canvas->setImagePage($width, $height, 0, 0);  
                    }  
                }  
                else  
                {  
                    $image->thumbnailImage( $width, $height, true );  

                    $draw = new ImagickDraw();  
                    $draw->composite($image->getImageCompose(), $x, $y, $dst_width, $dst_height, $image);  

                    $canvas->newImage($width, $height, $color, $this->get_type() );  
                    $canvas->drawImage($draw);  
                    $canvas->setImagePage($width, $height, 0, 0);  
                }  
                $image->destroy();  
                $this->image = $canvas;  
                break;  
            default:  
                $size = $this->image->getImagePage();   
                $src_width = $size['width'];  
                $src_height = $size['height'];  

                $crop_x = 0;  
                $crop_y = 0;  

                $crop_w = $src_width;  
                $crop_h = $src_height;  

                if($src_width*$height > $src_height*$width)  
                {  
                    $crop_w = intval($src_height*$width/$height);  
                }  
                else  
                {  
                    $crop_h = intval($src_width*$height/$width);  
                }  

                switch($fit)  
                {  
                    case 'north_west':  
                        $crop_x = 0;  
                        $crop_y = 0;  
                        break;  
                    case 'north':  
                        $crop_x = intval( ($src_width-$crop_w)/2 );  
                        $crop_y = 0;  
                        break;  
                    case 'north_east':  
                        $crop_x = $src_width-$crop_w;  
                        $crop_y = 0;  
                        break;  
                    case 'west':  
                        $crop_x = 0;  
                        $crop_y = intval( ($src_height-$crop_h)/2 );  
                        break;  
                    case 'center':  
                        $crop_x = intval( ($src_width-$crop_w)/2 );  
                        $crop_y = intval( ($src_height-$crop_h)/2 );  
                        break;  
                    case 'east':  
                        $crop_x = $src_width-$crop_w;  
                        $crop_y = intval( ($src_height-$crop_h)/2 );  
                        break;  
                    case 'south_west':  
                        $crop_x = 0;  
                        $crop_y = $src_height-$crop_h;  
                        break;  
                    case 'south':  
                        $crop_x = intval( ($src_width-$crop_w)/2 );  
                        $crop_y = $src_height-$crop_h;  
                        break;  
                    case 'south_east':  
                        $crop_x = $src_width-$crop_w;  
                        $crop_y = $src_height-$crop_h;  
                        break;  
                    default:  
                        $crop_x = intval( ($src_width-$crop_w)/2 );  
                        $crop_y = intval( ($src_height-$crop_h)/2 );  
                }  

                $image = $this->image;  
                $canvas = new Imagick();  

                if($this->type=='gif')  
                {  
                    $images = $image->coalesceImages();  
                    foreach($images as $frame){  
                        $img = new Imagick();  
                        $img->readImageBlob($frame);  
                        $img->cropImage($crop_w, $crop_h, $crop_x, $crop_y);  
                        $img->thumbnailImage( $width, $height, true );  

                        $canvas->addImage( $img );  
                        $canvas->setImageDelay( $img->getImageDelay() );  
                        $canvas->setImagePage($width, $height, 0, 0);  
                    }  
                }  
                else  
                {  
                    $image->cropImage($crop_w, $crop_h, $crop_x, $crop_y);  
                    $image->thumbnailImage( $width, $height, true );  
                    $canvas->addImage( $image );  
                    $canvas->setImagePage($width, $height, 0, 0);  
                }  
                $image->destroy();  
                $this->image = $canvas;  
        }  

    }  




    // 添加水印图片  
    public function add_watermark($path, $x = 0, $y = 0)  
    {  
        $watermark = new Imagick($path);  
        $draw = new ImagickDraw();  
        $draw->composite($watermark->getImageCompose(), $x, $y, $watermark->getImageWidth(), $watermark->getimageheight(), $watermark);  

        if($this->type=='gif')  
        {  
            $image = $this->image;  
            $canvas = new Imagick();  
            $images = $image->coalesceImages();  
            foreach($image as $frame)  
            {  
                $img = new Imagick();  
                $img->readImageBlob($frame);  
                $img->drawImage($draw);  

                $canvas->addImage( $img );  
                $canvas->setImageDelay( $img->getImageDelay() );  
            }  
            $image->destroy();  
            $this->image = $canvas;  
        }  
        else  
        {  
            $this->image->drawImage($draw);  
        }  
    }  


    // 添加水印文字  
    public function add_text($text, $x = 0 , $y = 0, $angle=0, $style=array())  
    {  
        $draw = new ImagickDraw();  
        if(isset($style['font'])) $draw->setFont($style['font']);  
        if(isset($style['font_size'])) $draw->setFontSize($style['font_size']);  
        if(isset($style['fill_color'])) $draw->setFillColor($style['fill_color']);  
        if(isset($style['under_color'])) $draw->setTextUnderColor($style['under_color']);  

        if($this->type=='gif')  
        {  
            foreach($this->image as $frame)  
            {  
                $frame->annotateImage($draw, $x, $y, $angle, $text);  
            }  
        }  
        else  
        {  
            $this->image->annotateImage($draw, $x, $y, $angle, $text);  
        }  
    }  


    // 保存到指定路径  
    public function save_to($path)  
    {  
        if($this->type=='gif')  
        {  
            $this->image->writeImages($path, true);  
        }  
        else  
        {  
            $this->image->writeImage($path);  
        }  
    }  

    // 输出图像  
    public function output($header = true)  
    {  
        if($header) header('Content-type: '.$this->type);  
        echo $this->image->getImagesBlob();exit;
    }  


    public function get_width()  
    {  
        $size = $this->image->getImagePage();   
        return $size['width'];  
    }  

    public function get_height()  
    {  
        $size = $this->image->getImagePage();   
        return $size['height'];  
    }  

    // 设置图像类型， 默认与源类型一致  
    public function set_type( $type='png' )  
    {  
        $this->type = $type;  
        $this->image->setImageFormat( $type );  
    }  

    // 获取源图像类型  
    public function get_type()  
    {  
        return $this->type;  
    }  


    // 当前对象是否为图片  
    public function is_image()  
    {  
        if( $this->image )  
            return true;  
        else  
            return false;  
    }  


    public function thumbnail($width = 100, $height = 100, $fit = true){ 
        $this->image->thumbnailImage( $width, $height, $fit );
    } // 生成缩略图 $fit为真时将保持比例并在安全框 $width X $height 内生成缩略图片  

    /* 
    添加一个边框 
    $width: 左右边框宽度 
    $height: 上下边框宽度 
    $color: 颜色: RGB 颜色 'rgb(255,0,0)' 或 16进制颜色 '#FF0000' 或颜色单词 'white'/'red'... 
    */  
    public function border($width, $height, $color='rgb(220, 220, 220)')  
    {  
        $color=new ImagickPixel();  
        $color->setColor($color);  
        $this->image->borderImage($color, $width, $height);  
    }  

    public function blur($radius, $sigma){$this->image->blurImage($radius, $sigma);} // 模糊  
    public function gaussian_blur($radius, $sigma){$this->image->gaussianBlurImage($radius, $sigma);} // 高斯模糊  
    public function motion_blur($radius, $sigma, $angle){$this->image->motionBlurImage($radius, $sigma, $angle);} // 运动模糊  
    public function radial_blur($radius){$this->image->radialBlurImage($radius);} // 径向模糊  

    public function add_noise($type=null){$this->image->addNoiseImage($type==null?imagick::NOISE_IMPULSE:$type);} // 添加噪点  

    public function level($black_point, $gamma, $white_point){$this->image->levelImage($black_point, $gamma, $white_point);} // 调整色阶  
    public function modulate($brightness, $saturation, $hue){$this->image->modulateImage($brightness, $saturation, $hue);} // 调整亮度、饱和度、色调  

    public function charcoal($radius, $sigma){$this->image->charcoalImage($radius, $sigma);} // 素描  
    public function oil_paint($radius){$this->image->oilPaintImage($radius);} // 油画效果  

    public function flop(){$this->image->flopImage();} // 水平翻转  
    public function flip(){$this->image->flipImage();} // 垂直翻转  

}  